Cost per Call

Cost per call (CPC) is the total operating cost of a call centre divided by the calls it handles in a period, usually one month. It is the single dial that links spend to volume, tying finance, staffing, and service quality to one sheet.

Two flavours run in practice. A fully loaded CPC folds in real estate, technology, and management overhead. A variable CPC tracks only agent labour and telephony per interaction.

Analysts quote both when they weigh an in-house team against a business process outsourcing (BPO) vendor. Voice is still the expensive channel, so CPC carries weight in every renewal talk.

ContactBabel’s 2024 UK Contact Centre Decision-Makers’ Guide put the average fully loaded inbound CPC near £4.53. Offshore delivery from the Philippines or India lands closer to £1.20–£2.00 for the same work.

Deloitte’s 2025 Global Contact Centre Survey flags CPC pressure rising as agent wages catch up and automation absorbs the simpler calls. That squeeze is why finance teams now ask for both CPC views by name.

Key takeaways

• CPC equals total operating cost divided by the calls handled in the same window.
• Fully loaded CPC carries overhead; variable CPC covers only agent labour and telephony.
• Median 2024 CPC sat near £4–6 onshore and US$1–3 offshore per inbound call.
• CPC climbs when handle time rises, occupancy falls, or turnover inflates onboarding spend.
• Cutting CPC without denting customer satisfaction (CSAT) means stripping waste — repeat calls, dead air, mis-routing — not corners.

How it works

Cost per call divides a contact centre’s total operating cost by the calls handled in the same window. The arithmetic is trivial; the fight is over which costs belong in the numerator, so most teams publish two views.

Cost per Call = Total Operating Costs ÷ Total Calls Handled

Take a 100-seat team spending US$250,000 in a month and handling 100,000 calls. That posts a CPC of US$2.50, the kind of number an offshore voice contract gets signed on.

Now let average handle time (AHT) drift from 5:30 to 6:45, so the team clears only 80,000 calls on the same spend. CPC lands at US$3.13 — a 25% rise from one operational miss.

Publish both views on the same slide. Finance signs off the fully loaded figure because it carries the overhead they fund, while operations manages the variable figure, the part a roster change can actually move.

The table below shows what operators fold into each version of the metric.

Four levers move the number. Volume comes first, because every extra call spreads the fixed base thinner. Handle time is next: shaving 30 seconds off AHT cuts variable CPC by roughly 8–10%.

First call resolution (FCR) swings the total too, since a five-point gain kills the repeat contacts that pad both the call count and the cost line.

Occupancy closes the set. Fewer paid idle minutes per shift means a lower labour cost per productive call, which is why forecasting accuracy hits the finance sheet as fast as it hits the roster.

Examples

Real cost per call figures cluster by geography and vertical. Offshore tier-one voice contracts signed through 2024 ran roughly US$1.10–US$1.80 per interaction, while onshore US regulated work sat several times higher.

Concentrix and Teleperformance, the two largest listed providers, both cite blended per-interaction pricing inside that band in their investor decks.

Foundever, formerly Sitel Group, moved a US retailer’s Spanish-language queue from Texas to Bogotá in 2023 and reported a 42% CPC reduction with CSAT holding within two points.

A Manila-based financial services BPO quoted US$1.20 per handled call on a mid-market credit-card programme in late 2024, against roughly US$4.60 for the same client’s residual US-based team.

The gap is almost entirely wages — they run 60–70% of any voice contact centre’s operating cost, per ICMI’s 2024 benchmark set.

TTEC and Alorica publish separate CPC bands for regulated verticals. Healthcare and financial services calls run 40–80% higher than retail, because handle times stretch, quality assurance is heavier, and agents need certifications that lift the wage line.

Vertical mix explains most of the spread you will see in vendor quotes, so ask which calls sit behind any headline CPC before you put two proposals side by side.

Related terms

These metrics sit next to cost per call on any contact centre scorecard, and each one moves it. Read CPC beside them rather than alone, or you will optimise the cost line straight into a service problem.

• Average Handle Time (AHT): the biggest single lever on variable CPC.
• First Call Resolution (FCR): high resolution rates shrink repeat volume and total cost.
• Occupancy Rate: higher occupancy means fewer paid idle minutes per productive call.
• Customer Satisfaction Rating (CSAT): the balancing metric that stops cost cuts damaging service.
• Interactive Voice Response (IVR): self-service deflection shrinks the call denominator.
• Workforce Management: forecasting accuracy cuts the overstaffing that inflates CPC.
• Knowledge Process Outsourcing (KPO): higher-complexity work carries a different cost curve.

FAQ

What is a good cost per call?

It depends on geography, vertical, and channel. Onshore US retail runs US$3–US$6 a call; onshore financial services or healthcare, US$8–US$15. Offshore delivery from the Philippines, India, or Colombia usually lands US$1–US$3.

How do you calculate cost per call?

Divide total operating costs for a period by the calls handled in that same period. Include wages, telephony, software, real estate, training, and management overhead for the fully loaded figure. Strip all but agent labour and telephony for the variable figure.

What drives cost per call up?

Rising handle time, forecasting misses that leave you overstaffed, turnover that inflates training spend, weak first call resolution that triggers repeat contacts, and shrinkage that eats occupancy. Every extra minute on a call lands straight in CPC.

How does outsourcing affect cost per call?

Offshoring to the Philippines, India, or Colombia typically cuts CPC by 50–70% against onshore US or UK delivery. Quality-adjusted savings tend to land at 30–50% once ramp time, quality assurance, and knowledge transfer are priced in. Wages drive the delta.

What is the difference between cost per call and cost per contact?

Cost per call covers voice only. Cost per contact covers every channel: voice, email, chat, social, and messaging, which is why it has become the standard metric for omnichannel operations. Most global operators track both so voice keeps its own history.

Should cost per call be the primary contact centre KPI?

No: read alone it pushes teams to cut corners that dent CSAT, so mature operators watch a CPC, CSAT, and FCR triangle instead.

Compare real CPC numbers with vetted BPO partners before you sign.